Engineering Quizzes Mechanics Engineering

Question:
A body of weight W is required to move up on rough inclined plane whose angle of inclination with the horizontal is α. The effort applied parallel to the plane is given by(where μ = tanφ = Coefficient of friction between the plane and the body.)

Option A):
P = W tanα
Option B):
P = W (cosα + μsinα)
Option C):
P = W (sinα + μcosα)
Option D):
P = W tan(α + φ)

Correct Answer is Option C):
P = W (sinα + μcosα)